Reaction of a Nitrosyl Complex of Co(II)‐Porphyrin with Hydrogen Peroxide: Formation of a Porphyrin Radical Cation
A nitrosyl complex of Co(II)-porphyrinate, [Co<sup>II</sup>(TTMPP<sup>2-</sup>)(NO)], 1 [TTMPPH<sub>2</sub>=5,10,15,20-tetrakis(3,4,5-trimethoxyphenyl)porphyrin] having {Co(NO)}<sup>8</sup> configuration has been synthesized and characterized spectroscopically as well as structurally. Complex 1 in dichloromethane:acetonitrile (1 : 4, v/v) solution at -40 °C reacts with hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) to result in the corresponding nitrite (NO<sub>2</sub> <sup>-</sup>) complex, [Co<sup>III</sup>(TTMPP<sup>2-</sup>)(NO<sub>2</sub> <sup>-</sup>)], 2. The formation of a Co(III)-peroxynitrite intermediate is presumed in this reaction based on the characteristic phenol ring nitration test. From spectroscopic studies, formation of [Co<sup>IV</sup>=O] species followed by a Co(III)-porphyrin radical complex was observed during the course of the reaction.
Authors
- Shankhadeep Saha (ORCID: https://orcid.org/0009-0006-0012-0696)
- Bapan Samanta
- Biplab Mondal (ORCID: https://orcid.org/0000-0002-0594-6749)
- Riya Ghosh (ORCID: https://orcid.org/0009-0008-3727-7616)
- Sayani Maity
Institutions
- Indian Institute of Technology Guwahati (IN)
Publication Details
- Journal
- Chemistry - An Asian Journal
- Published
- 2024-11-25
- DOI
- https://doi.org/10.1002/asia.202401082
- Primary Topic
- Porphyrin and Phthalocyanine Chemistry
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Department of Science and Technology, Ministry of Science and Technology, India
- Indian Institute of Technology Guwahati